IPSERV(8) IPSERV(8)
NAME
telnetd, rlogind, rexexec, ftpd, imap4d - Internet remote
access daemons
SYNOPSIS
ip/telnetd [-adnpt] [-u user]
ip/rlogind
ip/rexexec [-a]
ip/ftpd [-adp] [-n namepace-file]
ip/imap4d [-ap] [-d smtpdomain] [-s servername]
DESCRIPTION
These programs support remote access across the Internet.
All expect the network connection to be standard input, out-
put, and error. They are normally started from scripts in
/rc/bin/service (see listen(8)).
Telnetd allows login from a remote client. There are three
types of login:
normal Normal users log in by encrypting and returning a
challenge printed by telnetd. The user can use
either the netkey program (see passwd(1)) or a
SecureNet handheld authenticator to encrypt the
challenge. /lib/namespace defines the namespace.
noworld Users in group noworld in /adm/users authenticate
with a password in the clear.
/lib/namespace.noworld defines the namespace.
anonymous User none requires no authentication.
/lib/namespace defines the namespace.
The options are:
a allow anonymous login by none
d print debugging to standard error
p don't originate any telnet control codes
n turn on local character echoing and imply the p option
t trusted, that is, don't authenticate
u use user as the local account name
Rlogind logs in using the BSD remote login protocol.
Page 1 Plan 9 (printed 11/23/24)
IPSERV(8) IPSERV(8)
Rlogind execs telnetd -nu after completing its initial hand-
shake.
Rexexec executes a command locally for a remote client. It
uses the standard Plan 9 authentication (see auth(6)). Its
only option:
a allow anonymous access by none.
Ftpd runs the Internet file transfer protocol. Users may
transfer files in either direction between the local and
remote machines. As for telnetd, there are three types of
login:
normal Normal users authenticate via the same
challenge/response as for telnetd.
/usr/username/lib/namespace.ftp or, if that file
does not exist, /lib/namespace defines the names-
pace.
noworld Users in group noworld in /adm/users login using
a password in the clear. /lib/namespace.noworld
defines the namespace.
anonymous Users anonymous and none require no authentica-
tion. The argument to the -n option (default
/lib/namespace.ftp) defines the namespace.
Anonymous users may only store files in the sub-
tree below /incoming.
The options are:
a allow anonymous access
n the namespace for anonymous users (default
/lib/namespace.ftp)
d write debugging output to standard error
Imap4d provides access to a user's mailboxes via the
IMAP4rev1 protocol. Only files rooted in
/mail/box/username/ are accessible. The list of subscribed
mailboxes is contained in
/mail/box/username/imap.subscribed, and initially contains
only INBOX, IMAP's name for the user's mailbox. A shadow
file, mailbox.imp, is created for each mailbox examined.
The options are:
a Assume the user is already authenticated. By default,
the user must authenticate using CRAM-MD5 or
securenet(8) challenge/response authentication.
p Allow login authentication. This option should only be
Page 2 Plan 9 (printed 11/23/24)
IPSERV(8) IPSERV(8)
enabled for servers using an encrypted connection, such
as SSL, and when enabled, all non-encrypted connections
should be disallowed. Imap4d does not enforce this
policy.
s The server's name. If none is provided, cs (see
ndb(8)) is queried or /env/sysname is used.
d The local mail domain. Defaults to the server
/env/site in the mail server's domain.
FILES
/lib/namepace
/usr/username/lib/namespace.ftp
/lib/namespace.world
/lib/namespace.ftp
/mail/box/username/mailbox
/mail/box/username/mailbox.imp
/mail/box/username/imap.subscribed
SOURCE
/sys/src/cmd/ip/telnetd.c
/sys/src/cmd/ip/rlogind.c
/sys/src/cmd/ip/rexexec.c
/sys/src/cmd/ip/ftpd.c
/sys/src/cmd/ip/imap4d/
SEE ALSO
ftpfs(4)
Page 3 Plan 9 (printed 11/23/24)